package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constants.RedisConstant;
import com.atguigu.lease.common.jwt.JwtUtil;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.springmvc.LeaseException;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import io.jsonwebtoken.Claims;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    //注入RedisTemplate，要加上泛型，泛型影响对象注入
    @Autowired
    private RedisTemplate<String,Object> redisTemplate;

    @Autowired
    private SystemUserService systemUserService;
    @Override
    public CaptchaVo sendCode() {
        //1.生成验证码 ，图片长宽，验证码位数
        SpecCaptcha specCaptcha = new SpecCaptcha(130,48,4);
        //验证码是什么类型
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);//字母数字混合
        //生成验证码图片，直接用base64转成字符串
        String imageBase64 = specCaptcha.toBase64();
        //图片对应的验证码字符串
        String code = specCaptcha.text();
        //2.正确验证码的值+uuid存储到redis中
        //得到一个uuid
        String uuidKey = RedisConstant.ADMIN_LOGIN_PREFIX+UUID.randomUUID().toString().replace("-", "");
        redisTemplate.opsForValue().set(uuidKey,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC,TimeUnit.SECONDS);
        //3.拼接CaptchaVo （验证码图片和uuid）
        CaptchaVo captchaVo=new CaptchaVo(imageBase64,uuidKey);
        return captchaVo;
    }

    @Override
    public String login(LoginVo loginVo) {
        //1.从redis中获取验证码，校验验证码是否过期
        //从redis中获取验证码
        String redisCode =(String) redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        //若验证码为空则说明过期，排除异常
        if(ObjectUtils.isEmpty(redisCode)){
            throw  new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //2.校验验证码是否正确（前端传的和redis中的是否一致）
        if(!redisCode.equalsIgnoreCase(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //3.校验账号是否存在
        LambdaQueryWrapper<SystemUser> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(lambdaQueryWrapper);
        if(systemUser==null){
            //账号不存在
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //4.校验前端输入密码和数据库中密码是否一致
        //先给前端传过来的密码加密
        String password = DigestUtils.md5Hex(loginVo.getPassword());
        if(!password.equals(systemUser.getPassword())){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //5.账号是否可用
        if(systemUser.getStatus()== BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //6.创建token
        String token = JwtUtil.createToken(systemUser.getId(),systemUser.getUsername());
        return token;
    }

    @Override
    public SystemUserInfoVo customInfo(String accessToken) {
        //1.解析token，获取claims
        Claims claims = JwtUtil.parseToken(accessToken);
        //2.从claims中获取userId
        Integer userId = (Integer) claims.get("userId");
        //3.根据userId查数据
        SystemUser systemUser = systemUserService.getById(userId);
        //只需要SystemUserInfoVo中的数据，所以创建SystemUserInfoVo对象，将属性值赋进去
        SystemUserInfoVo systemUserInfoVo=new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName());
        systemUserInfoVo.setAvatarUrl(systemUser.getAvatarUrl());
        return systemUserInfoVo;
    }
}
